summaryrefslogtreecommitdiff
path: root/macros/luatex/generic/luatexja/src/ltj-otf.lua
blob: 56c0154e34c0b9695da62f08713d945f68fb4209 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
--
-- ltj-otf.lua
--
require 'unicode'
require 'lualibs'

luatexja.load_module 'base';      local ltjb = luatexja.base
luatexja.load_module 'jfont';     local ltjf = luatexja.jfont
luatexja.load_module 'rmlgbm';    local ltjr = luatexja.rmlgbm
luatexja.load_module 'charrange'; local ltjc = luatexja.charrange
luatexja.load_module 'direction'; local ltjd = luatexja.direction
luatexja.load_module 'stack';     local ltjs = luatexja.stack
luatexja.load_module 'lotf_aux';  local ltju = luatexja.lotf_aux

local id_glyph = node.id 'glyph'
local id_whatsit = node.id 'whatsit'
local sid_user = node.subtype 'user_defined'

local setfield = node.direct.setfield
local getfield = node.direct.getfield
local getid = node.direct.getid
local getfont = node.direct.getfont
local getchar = node.direct.getchar
local getsubtype = node.direct.getsubtype
local to_node = node.direct.tonode
local to_direct = node.direct.todirect
local node_new = node.direct.new
local node_remove = node.direct.remove
local node_next = node.direct.getnext
local node_free = node.direct.free
local has_attr = node.direct.has_attribute
local set_attr = node.direct.set_attribute
local unset_attr = node.direct.unset_attribute
local node_insert_after = node.direct.insert_after
local node_write = node.direct.write
local node_traverse_id = node.direct.traverse_id

local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
local attr_curtfnt = luatexbase.attributes['ltj@curtfnt']
local attr_yablshift = luatexbase.attributes['ltj@yablshift']
local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
local attr_tablshift = luatexbase.attributes['ltj@tablshift']
local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
local lang_ja = luatexja.lang_ja
local font_getfont = font.getfont

local ltjf_font_metric_table = ltjf.font_metric_table
local ltjf_font_extra_info = ltjf.font_extra_info
local ltjf_find_char_class = ltjf.find_char_class
local ltjr_cidfont_data = ltjr.cidfont_data
local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
local ltjd_get_dir_count = ltjd.get_dir_count
local dir_tate = luatexja.dir_table.dir_tate

luatexja.userid_table.OTF = luatexbase.newuserwhatsitid('char_by_cid',  'luatexja')
local OTF = luatexja.userid_table.OTF
local tex_get_attr = tex.getattribute

local cache_ver = 3
local ivd_aj1 = ltjb.load_cache('ltj-ivd_aj1',
   function (t) return t.version~=cache_ver end)
if not ivd_aj1 then -- make cache
   ivd_aj1 = require('ltj-ivd_aj1.lua')
   ltjb.save_cache_luc('ltj-ivd_aj1', ivd_aj1)
end


local function get_ucs_from_rmlgbm(c)
   local v = (ivd_aj1 and ivd_aj1.table_ivd_aj1[c]
      or ltjr_cidfont_data["Adobe-Japan1"].resources.unicodes["Japan1." .. tostring(c)])
      or 0
   if v>=0x200000 then -- table
      local curjfnt = tex_get_attr(
        (ltjd_get_dir_count()==dir_tate) and attr_curtfnt or attr_curjfnt)
      local tfmdata = font_getfont(curjfnt)
      if tfmdata and tfmdata.resources then
        local base, ivs = v % 0x200000, 0xE00FF + math.floor(v/0x200000)
        curjfnt = tfmdata.resources.variants; curjfnt = curjfnt and curjfnt[ivs]
        return curjfnt and curjfnt[base] or base
      else return base
      end
   elseif v<0xF0000 then -- 素直に Unicode にマップ可能
      return v
   else -- privete use area
      local r, aj = nil, ltjr_cidfont_data["Adobe-Japan1"] 
      -- 先に ltj_vert_table を見る
      for i,w in pairs(aj.ltj_vert_table) do
         if w==v then r=i; break end
      end
      if not r then
         -- なければ ToUnicode から引く
         local w = aj.characters[v].tounicode -- must be non-nil!
         local i = string.len(w)
         if i==4 then -- UCS2
            r = tonumber(w,16)
         elseif i==8 then
            i,w = tonumber(string.sub(w,1,4),16), tonumber(string.sub(w,-4),16)
            if (w>=0xD800) and (w<=0xDB7F) and (i>=0xDC00) and (i<=0xDFFF) then -- Surrogate pair
               r = (w-0xD800)*0x400 + (i-0xDC00)
            else
               r = 0
            end
         end
      end
      if aj.ltj_vert_table[r] then
         -- CID が縦組用字形だった場合
         return ltju.replace_vert_variant(
            tex_get_attr((ltjd_get_dir_count()==dir_tate) and attr_curtfnt or attr_curjfnt),
            r)
      end
      return r
   end
end

-- Append a whatsit node to the list.
-- This whatsit node will be extracted to a glyph_node
local function append_jglyph(char)
   local p = node_new(id_whatsit,sid_user)
   setfield(p, 'user_id', OTF); setfield(p, 'type', 100)
   setfield(p, 'value', char);  node_write(p)
end

local utf
do
   utf = function (ucs)
      if ltjd_get_dir_count()==dir_tate then
         ucs = ltju.replace_vert_variant(
            tex_get_attr((ltjd_get_dir_count()==dir_tate) and attr_curtfnt or attr_curjfnt),
            ucs)
      end
      return append_jglyph(ucs)
   end
end

local cid
do
   local ord = {
      ['Japan1']=true, ['GB1']=true, ['CNS1']=true, ['Korea1']=true, ['KR']=true
   }
   cid = function (key)
      if key==0 then return append_jglyph(0) end
      local curjfnt = tex_get_attr(
         (ltjd_get_dir_count()==dir_tate) and attr_curtfnt or attr_curjfnt)
      local cidinfo = ltju.get_cidinfo(curjfnt)
      if type(cidinfo)~="table" or not ord[cidinfo.ordering] then
            return append_jglyph(get_ucs_from_rmlgbm(key))
      else
         local char = ltjf_font_extra_info[curjfnt].ind_to_uni[key] or 0
         return append_jglyph(char)
      end
   end
end

local function extract(head)
   head = to_direct(head)
   local p = head
   local is_dir_tate = ltjs.list_dir == dir_tate
   local attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
   local attr_kblshift = is_dir_tate and attr_tkblshift or attr_ykblshift
   local attr_curfnt =   is_dir_tate and attr_curtfnt or attr_curjfnt
   while p do
      if getid(p)==id_whatsit then
         if getsubtype(p)==sid_user then
            local puid = getfield(p, 'user_id')
            if puid==OTF then
               local g = node_new(id_glyph)
               setfield(g, 'subtype', 0)
               setfield(g, 'char', getfield(p, 'value'))
               local v = has_attr(p, attr_curfnt); setfield(g, 'font', v)
               setfield(g, 'lang', lang_ja)
               set_attr(g, attr_kblshift, has_attr(p, attr_kblshift))
               head = node_insert_after(head, p, g)
               head = node_remove(head, p)
               node_free(p); p = g
            end
         end
      end
      p = node_next(p)
   end
   return to_node(head)
end

ltjb.add_to_callback('hpack_filter', extract,'ltj.otf',
  luatexbase.priority_in_callback('hpack_filter', 'ltj.main'))
ltjb.add_to_callback('pre_linebreak_filter', extract,'ltj.otf',
  luatexbase.priority_in_callback('pre_linebreak_filter', 'ltj.main'))
-- additional callbacks
-- 以下は,LuaTeX-ja に用意された callback のサンプルになっている.
--   JFM の文字クラスの指定の所で,"AJ1-xxx" 形式での指定を可能とした.

-- 和文フォント読み込み時に,ind -> unicode 対応をとっておく.
local function ind_to_uni(fmtable, fn)
   if fn<0 then return end
   local cid = ltju.get_cidinfo(fn);
   local t = ltjf_font_extra_info[fn]; t = t and t.ind_to_uni
   if t and cid.ordering == "Japan1" then
      for i, v in pairs(fmtable.chars) do
         local j = string.match(i, "^AJ1%-([0-9]*)")
         if j then
            j = t[i]
            if j then
               fmtable.cid_char_type = fmtable.cid_char_type  or {}
               fmtable.cid_char_type[j] = v
            end
         end
      end
   end
   return fmtable
end
luatexbase.add_to_callback("luatexja.define_jfont",
                           ind_to_uni, "ltj.otf.define_jfont", 1)
--  既に読み込まれているフォントに対しても,同じことをやらないといけない
for fn, v in pairs(ltjf_font_metric_table) do
   ltjf_font_metric_table[fn] = ind_to_uni(v, fn)
end


local function cid_set_char_class(arg, fmtable, char)
   if arg~=0 then return arg
   elseif fmtable.cid_char_type then
      return fmtable.cid_char_type[char] or 0
   else return 0
   end
end
luatexbase.add_to_callback("luatexja.find_char_class",
                           cid_set_char_class, "ltj.otf.find_char_class", 1)

--IVS
local function enable_ivs()
  ltjb.package_warning('luatexja-otf',
     'luatexja.otf.enable_ivs() has now no effect.')
end
local disable_ivs = enable_ivs

luatexja.otf = {
  append_jglyph = append_jglyph,
  enable_ivs = enable_ivs, disable_ivs = disable_ivs,
  cid = cid, utf = utf,
}


-- EOF